Machine for skiving leather.



R. L. FELIX.

MACHINE FOB. SKIVING LEATHER.

APPLICATION IILBD OCT. 3, 1911.

1,069,684. Patented A g-12,1913.

A FVGTA' I l V i l /0 0/2 5 8 WITNESSES UNTTEB TATE PATENT @FFTQE.

ROBERT L. FELIX, OF MARLBORO, MASSACHUSETTS.

MACHINE FOR SKIVING LEATHER.

Application filed October 3, 1911.

To a whom it may concern Be it known that I, ROBERT L. FELIX, a citizen of the United States, residing in Marlboro, Massachusetts, have invented certain new and useful Improvements in Machines for Skiving Leather, of which the following is a specification.

My invention relates to leather skiving machines and particularly to a chip guard especially designed to be applied to the type of skiving machine employing a circular knife, and illustrated, for example, in U. S. Letters Patent 698,918 granted to B. Fischer April 29, 1902.

Heretofore, in the operation of this (Slur-N of machine, the knife gradually filled with chips or skivings and when the knife was full the chips would fly out into the operators face and all over the bench and floor. The operator would then have to stop the machine and clean out the knife, occasioning an obvious loss in time and money. By the use of my invention the chips or skivings are removed from the knife as soon as they are made and directed into a receptacle provided for that purpose.

I have illustrated in the drawing one embodiment of my invention.

For the sake of clearness I have shown in the drawing (Figure 1) a few representative parts of a circular knife skiving machine having applied thereto my guard in its proper relation to the parts.

Fig. 1 of the drawing is a longitudinal section of my guard applied to the related parts of a skiving machine; Fig. 2 is a front elevation view thereof; and Fig. 3 is a side elevation of the guard.

Reference numeral 1 designates the circular cutting knife; 2 the knife shaft, and 3 the casing for the shaft. The casing 3 is provided with a rack 1. A pinion 5, operated from the outside of the machine, cooperates with rack 4 to shift the casing, shaft and knife endwise to compensate for wear. Power is supplied through the pulley 6 to revolve the shaft and knife thereon.

The parts just described constitute representative parts of a circular knife skiving machine related to my invention. The guard forming the subject matter of my invention consists of the following: A disk 7 fits within the circular knife 1 with just enough clearance to allow the knife to revolve freely around the disk. The disk 7 is rigidly fixed to the head 8 of a stub shaft 9 which is Specification of Letters Patent.

1 j l l Patented Au 12,1913.

Serial No. 652,598.

mounted in a bore in the end of the knife shaft 2. The stub shaft 9 is provided near its inner end with a groove 10. A screw 11 is mounted in the knife shaft in such a manner that the rounded end of the screw engages the groove 10. The stub shaft and its disk 7 is thus locked against cndwise movement, but rotary movement between the two shafts is freely permitted. Any means of llubrication (not illustrated) may be employed. Screwed or otherwise rigidly fixed 1 to the lower part of disk 7 is a scoop-shaped guard 12. Extending from the guard 12 is a connecting rod 13 which runs through apertures in a bracket 1a which is firmly secured to a stationary part of the machine. The guard disk and stub shaft are thus held against rotary movement. The scoop 12 is designed to receive the larger chips formed by the skiving operation and drain them off into any convenient receptacle. In the operation of skiving, however, very small chips are also formed which have a tendency to stick to the inner surface of the knife. These are taken care of by a supplementary guard about to be described. An he short end of the arm is connected by means of the coiled spring 17 to a fixed point 18 on the disk 7 in such a manner that the long end of the arm, carrying a scraper 19, bears against the inner periphery of the knife. The scraper 19 continuously removes the small chips which would otherwise stick to the inner periphery of the knife. When the scraper 19 is loaded with small chips, its weight overbalances the spring and the scraper drops down and deposits the chips in the scoop 12 from whence they drop into the receptacle.

The operation of the machine is as follows: The knife is revolved at a high rate of speed to perform the skiving. The guard mechanism is held stationary by the connecting rod 13 and bracket 1d and takes care of all the chips formed by the skiving operation in the manner just described. hen it is desired to move the cutter endwise to compensate for wear, the shaft is moved to the left through the rack and pinarm 15 is fulcrumed at 16 to guard disk 7.

ion 4;, 5 and the guard moves forward with I claim:

1. In a leather skiving machine, the combination of a rotatable cup-shaped knife, a housing, a bearing in said housing adapted to support the knife, means for moving said bearing in the direction of its axis, a disk mounted within the knife, and means for holding said disk against rotation and at the same time allowing it to move with the knife in the direction of its axis.

2. In a leather skiving machine, the com bination of a rotatable cup-shaped knife, a housing, a bearing in said housing adapted to support the knife, means for moving said bearing in the direction of its axis, a disk mounted within the knife, a scoop mounted upon said disk, and means for holding said disk against rotation and at the same time allowing it to move with the knife in the direction of its axis.

3. In a leather skiving machine, the combination of a rotatable cupshaped knife, a housing, a bearing in said housing adapted to supportthe knife, means for moving said bearing in the direction of its axis, a disk mounted within the knife, a'spring-pressed scraper mounted upon the disk and engaging the inner periphery of the knife, and means for holding said disk against rotation and at the same time allowing it to move with the knife in the direction of its axis.

4. In a leather skiving machine, the combination of a rotatable cup-shaped knife, a housing, a bearing in said housing adapted to support the knife, means for moving said bearing in the direction of its axis, a disk mounted within the knife, a scoop mounted upon said disk, a spring-pressed scraper also mounted upon the disk and engaging the inner periphery of the knife, and means for holding said disk against rotation and at the same time allowing it to move with the knife in the direct-ion of its axis.

5. In a leather skiving machine, the combination of a rotatable cup-shaped knife, a stationary disk mounted therein adapted completely to coverthe bottom of said knife, and a scoop mounted upon said disk.

6. In a leather. skiving machine, the combination of a rotatable cup-shaped knife, a stationary disk mounted therein adapted completely to cover the. bottom of said knife, and a spring-pressed scraper mounted upon said disk and adapted to engage, the inner periphery of the knife.

7. In a leather skiving machine, the combination of a rotatable cup-shaped knife, a stationary disk mounted therein adapted completely to cover the bottom of said knife, a scoop mounted upon said disk, and a spring-pressed scraper also mounted upon the disk and adapted to engage the inner periphery of the knife.

8. In a leather skiving machine, the combination of a rotatable cup-shaped knife, a stationary disk mounted therein and a spring-pressed scraper pivotally mounted upon. said disk and adapted to engage the inner periphery of the knife.

9. In a leather skiving machine, the combination of a rotatable cup-shaped knife, a stationary disk mounted therein, a springpressed scraper pivotally mounted upon said disk and adapted to engage the inner periphery of the knife, and a scoop also mounted upon saiddisk and adapted to receive the scrapings of said scraper.

ROBERT L. FELIX. Vitnesses R. H. BEAUDREAU, Rosn B. POITRAS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

